Another thing to consider when you book with Travel Funds (credit), your new ticket retains the expiration date of the credit, not the date you purchased it. For example, I bought a ticket for December on 6/20/19. The other day the price went down and I got a $150 credit. I booked a ticket on 10/31 for next April and used the $150 credit. That April ticket now shows an expiration date of 6/20/20, not 10/31/20. For $150 credit, it's worth it (I only ended up paying $14) but for a $10 or $20 credit you need to think about that. If my April trip goes down, I probably would not bother because any new ticket I purchase with the credit will expire 6/20/20.